Check sibling questions

Ex 5.3, 1 Class 10 (NCERT Solutions) - Find sum of APs (i) 2, 7, 12,

Ex 5.3, 1 - Chapter 5 Class 10 Arithmetic Progressions - Part 2

This video is only available for Teachoo black users

Ā 


Transcript

Ex 5.3, 1 Find the sum of the following APs. (i) 2, 7, 12 ,ā€¦., to 10 terms. 2, 7, 12,ā€¦., to 10 term s We know that Sum of AP = š‘›/2 (2a + (n ā€“ 1) d) Here n = 10, a = 2, & d = 7 ā€“ 2 = 2 Putting these in formula , Sum = š’/šŸ (2a + (n ā€“ 1) d) = 10/2 (2 Ɨ 2 + (10 ā€“ 1) Ɨ 5) = 5(3 + 9 Ɨ 5) = 5 (4 + 45) = 5 (49) = 245

Davneet Singh's photo - Teacher, Engineer, Marketer

Made by

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.